Export of IDN configuration and SSO


I am trying to export using the /beta/sp-config/export rule
I have checked my JSON rule and it looks fine and have validated through 3rd party tool
We do have SSO enabled and using Microsoft for MFA
I am getting a 200 but then I am getting the following message
<strong>Note: Since your browser does not support JavaScript,

  •            you must press the Continue button once to proceed.*

What I could read up it looks like a SSO issue
I have added login/login?prompt=true but I am still getting the error.
Any ideas?